<template>
  <div>
    <!-- 评论列表 -->
    <div class="cmt-list" :class="isShow ? 'box1' : 'box2'">
      <!-- 评论的 Item 项 -->
      <!-- 下拉加载跟多哈 immediate-check 初始化不能立即执行加载 -->
      <van-list
  v-model="loading"
  :finished="done"
  :immediate-check='false'
  offset="40"
  finished-text="还TMD啦,都没有啦"
  @load="onLoad"
>
<!--  动不动key 绑定的重复是什么鬼 -->
  <div class="cmt-item" v-for="(obj, index) in commentList" :key="index">
        <!-- 头部区域 -->
        <div class="cmt-header">
          <!-- 头部左侧 -->
          <div class="cmt-header-left">
            <img :src="obj.aut_photo" alt="" class="avatar">
            <span class="uname">{{obj.aut_name}}</span>
          </div>
          <!-- 头部右侧 -->
          <div class="cmt-header-right">
            <van-icon name="like" size="16" color="red" v-if="obj.is_liking" @click="likeFn(obj)"/>
            <van-icon name="like-o" size="16" color="gray" v-else @click="likeFn(obj)" />
          </div>
        </div>
        <!-- 主体区域 -->
        <div class="cmt-body">
 {{obj.content}}
        </div>
        <!-- 尾部区域 -->
        <div class="cmt-footer">{{$timeAgo(obj.pubdate)}}</div>
      </div>
</van-list>
    </div>
    <!-- 底部添加评论区域 - 1 -->
<div class="add-cmt-box van-hairline--top" v-if="isShow">
  <van-icon name="arrow-left" size="0.48rem" @click="$router.go(-1)" />
  <div class="ipt-cmt-div" @click="isShow=false">发表评论</div>
  <div class="icon-box">
    <van-badge :content="total" max="99">
      <van-icon name="comment-o" size="0.53333334rem" />
    </van-badge>
    <van-icon name="star-o" size="0.53333334rem" />
    <van-icon name="share-o" size="0.53333334rem" />
  </div>
</div>
<!-- 底部添加评论区域 - 2 v-focus-->
<div class="cmt-box van-hairline--top" v-else>
  <textarea v-focus v-model.trim.lazy="content"  placeholder="友善评论、理性发言、阳光心灵" @blur="guanBi"></textarea>
  <van-button type="default"  @click="pulishFn">发布</van-button>
</div>
  </div>
</template>

<script>
//
import { commentPinApi, likeApi, nolikeApi, pulishArticleApi } from '@/api/article'
export default {
  name: 'comment',
  data () {
    return {
      // 控值发表文本域
      isShow: true,
      // 所有评论条数哈
      commentList: [],
      // 总数量
      total: null,
      // 文本框的的内容哈
      content: '',
      // 当前也下拉记载
      loading: false,
      // 整个加载完毕
      done: false
    }
  },
  created () {
    this.pullFn()
  },
  methods: {
    async likeFn (obj) {
      try {
        obj.is_liking ? await nolikeApi({ likeid: obj.com_id }) : await likeApi({ likeid: obj.com_id })
        this.$toast.success(obj.is_liking ? '取赞成功' : '点赞成功')
        obj.is_liking = !obj.is_liking
      } catch (e) {
        this.$toast.fail(obj.is_liking ? '取赞失败' : '点赞失败')
      }
    },
    // 失去焦点
    guanBi () {
      // 失去焦点使用异步函数关闭文本域跟优雅一些
      setTimeout(() => {
        this.isShow = true
      })
    },
    async  pulishFn () {
      const res = await pulishArticleApi({
        artId: this.$route.query.art_id,
        content: this.content
      })
      const { new_obj } = res.data
      // 加添加到数组中就好啦
      this.commentList.unshift(new_obj)
    },
    // 下来记载跟多的评论信息哈
    onLoad () {
      this.pullFn()
    },
    async pullFn () {
      const res = await commentPinApi({
        artId: this.$route.query.art_id,
        offset: this.offset
      })
      const { last_id, results, total_count } = res.data
      this.total = total_count
      this.offset = last_id
      if (results.length === 0) {
        this.commentList = [...this.commentList, ...results]
        this.done = true
        return
      }
      this.commentList = [...this.commentList, ...results]
      // 每加载完当期页面还想加载下一页就给当前加载页设置为false
      this.loading = false
    }
  }

}
</script>

<style scoped lang="less">
.cmt-list {
  padding: 10px;
  .cmt-item {
    padding: 15px 0;
    + .cmt-item {
      border-top: 1px solid #f8f8f8;
    }
    .cmt-header {
      display: flex;
      align-items: center;
      justify-content: space-between;
      .cmt-header-left {
        display: flex;
        align-items: center;
        .avatar {
          width: 40px;
          height: 40px;
          background-color: #f8f8f8;
          border-radius: 50%;
          margin-right: 15px;
        }
        .uname {
          font-size: 12px;
        }
      }
    }
    .cmt-body {
      font-size: 14px;
      line-height: 28px;
      text-indent: 2em;
      margin-top: 6px;
      word-break: break-all;
    }
    .cmt-footer {
      font-size: 12px;
      color: gray;
      margin-top: 10px;
    }
  }
}
/*美化 - 文章详情 - 底部的评论页面 */
// 外层容器
.box1 {
  padding-bottom: 46px;
}
.box2 {
  padding-bottom: 80px;
}

// 发布评论的盒子 - 1
.add-cmt-box {
  position: fixed;
  bottom: 0;
  left: 0;
  width: 100%;
  box-sizing: border-box;
  background-color: white;
  display: flex;
  justify-content: space-between;
  align-items: center;
  height: 46px;
  line-height: 46px;
  padding-left: 10px;
  .ipt-cmt-div {
    flex: 1;
    border: 1px solid #efefef;
    border-radius: 15px;
    height: 30px;
    font-size: 12px;
    line-height: 30px;
    padding-left: 15px;
    margin-left: 10px;
    background-color: #f8f8f8;
  }
  .icon-box {
    width: 40%;
    display: flex;
    justify-content: space-evenly;
    line-height: 0;
  }
}

.child {
  width: 20px;
  height: 20px;
  background: #f2f3f5;
}

// 发布评论的盒子 - 2
.cmt-box {
  position: fixed;
  bottom: 0;
  left: 0;
  width: 100%;
  height: 80px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 12px;
  padding-left: 10px;
  box-sizing: border-box;
  background-color: white;
  textarea {
    flex: 1;
    height: 66%;
    border: 1px solid #efefef;
    background-color: #f8f8f8;
    resize: none;
    border-radius: 6px;
    padding: 5px;
  }
  .van-button {
    height: 100%;
    border: none;
  }
}
</style>
